A body cools in \( 7 \mathrm{~min} \) from \( 60^{\circ} \mathrm{C} \) to \( 40^{\circ} \mathrm{...

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A body cools in \( 7 \mathrm{~min} \) from \( 60^{\circ} \mathrm{C} \) to \( 40^{\circ} \mathrm{C} \), then what will be its temperature after the next \( 7 \mathrm{~min} \) ? The temperature of the surroundings is \( 10^{\circ} \mathrm{C} \).
(a) \( 40^{\circ} \mathrm{C} \)
(b) \( 30^{\circ} \mathrm{C} \)
(c) \( 15^{\circ} \mathrm{C} \)
(d) \( 28^{\circ} \mathrm{C} \)
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